AMMI, SREG and FREG models for stability analysis in SPAR 2.0

Abstract

Yield stability as a selection trait in plant breeding programmes and evaluation trials is constantly gaining importance over yielding ability. Some of the common techniques as an alternative to additive ANOVA model are Additive Main effects and Multiplicative Interaction (AMMI), Sites Regression (SREG) and Factorial Regression (FREG) etc. SPAR 2.0 (Ahujaa et al 2005) has a module on stability analysis, in which stability analysis can be performed using the three models, Eberhart and Russell (1966), Perkins and Jinks (1968) and Freeman and Perkins (1971) in a user friendly mode. However, it cannot perform stability analysis using AMMI, SREG and FREG models and integrated with SPAR 2.0. It has been developed using VC++ and VB, which are more flexible, user-friendly and economic. Data input can be from an ASCII or an Excel file. There is no restriction on the number of response variables and observations. It has been provided with an extensive Help document on statistical concepts involved, use of the software, example of data file, example of input files and output files. It has also the options like favorites and search through contents and index.